Troubleshooting Tables - SMC Networks EX260-MEC1 Operation Manual

9.2. Troubleshooting tables

State
Incorrect wiring.
PWR LED is OFF.
Power supply for control (PWR) is
not present or is at an unusable
level.
PWR LED is Power supply for control (PWR) is
flashing. (0.5 Hz) low.(< approx. 18 VDC)
State
Incorrect wiring.
PWR(V) LED is
OFF.
Power supply for valves (PWR(V))
is not present or is at an unusable
level.
Table 9-3. Troubleshooting "L/A LEDs are OFF or ERR LED is double flashing"
State
Incorrect wiring.
L/A1 LED and
L/A2 LED are both
OFF.
The SI Unit is not connected to a
valid network.
ERR LED is The communication connection
double flashing. disconnected.
Table 9-4. Troubleshooting "RUN LED is not green ON or ERR LED is flashing"
State
The SI Unit is connected to some
kind of network, but the following
problems are occurring.
RUN LED is not
No communication with the
green ON.
EtherCAT
There is a problem with the
EtherCAT
The output No. which assigned "8
ERR LED is
valves" module is more than the
flashing. (2.5 Hz)
number of valve outputs connected.
Table 9-1. Troubleshooting "PWR LED is OFF or flashing"
Probable causes
Table 9-2. Troubleshooting "PWR(V) LED is OFF"
Probable causes
Probable causes
Probable causes
master.
Ⓡ
master.
Ⓡ
Checking methods and measures
 Check the power cable wiring.
 Check the wiring and pin numbers,
refer to Section
 Check the power supply.
 Check the supplied voltage for PWR.
 Check the supplied voltage for PWR.
Supply the voltage considering the voltage drop
on the wiring.
Checking methods and measures
 Check the power cable wiring.
 Check the wiring and pin numbers,
refer to Section
 Check the power supply.
 Check the supplied voltage for PWR(V).
Supply the voltage considering the voltage drop
on the wiring.
Checking methods and measures
 Check the communication cable wiring.
 Check the wiring and pin numbers,
refer to Section
 Check the state of the EtherCAT
connected to the SI Unit.
 Check the communication cable connection.
Checking methods and measures
---
 Check the communication cable wiring.
 Communicate to EtherCAT
 Check the EtherCAT
 Refer to Diagnosis history
the slot setting to match the number of
connected valve stations.
Refer to Section
-29-
2.2.2.
2.2.2.
2.2.1.
master
®
master.
®
master state.
®
(Section 6.2) and set
3.2.
No.DOC1041432